CVE-2019-25724: Dräger Infinity M300 Denial-of-Service Vulnerability Impact on Patient Monitoring

Technical summary

CVE-2019-25724 is a network-accessible denial-of-service vulnerability affecting Dräger's Infinity M300 wearable monitoring devices (software VG2.x and earlier). The vulnerability stems from improper handling of network requests that can force the device into repeated reboot cycles (CWE-400: Uncontrolled Resource Consumption). An unauthenticated attacker with network access to the hospital infrastructure or Infinity Network can systematically exhaust the device's recovery capabilities, pushing it into a fail state where only manual restart restores operation. The attack requires no special privileges, no user interaction, and operates over the local network segment.

Business impact

Patient safety and operational continuity are directly at risk. Loss of wireless monitoring during an active attack means clinicians lose real-time visibility into patient vital signs, potentially delaying recognition of clinical events. Alarm suppression prevents notification of critical changes. In a multi-bed environment or ICU setting, widespread attacks could degrade monitoring coverage across multiple patients simultaneously. Recovery requires staff to physically locate and manually restart each affected device, consuming nursing time and creating workflow disruption. The reputational and regulatory burden of a monitoring gap—particularly if correlated with an adverse patient outcome—is substantial.

Affected systems

Dräger Infinity M300 wearable patient monitors running software version VG2.x or earlier are in scope. The vendor and product names confirm this is a Dräger-manufactured device class. Organizations should identify all M300 units deployed in clinical areas and verify their current software versions against the VG2.x threshold. Verify against Dräger advisories for the precise cutoff version and any affected variant models or configuration states.

Exploitability

Exploitability is moderate. The attack requires the adversary to be present on or able to reach the hospital network or Infinity Network—a constraint that limits the attacker pool to insider threats, compromised clinical workstations, or network segments that are not adequately isolated. No authentication or user interaction is required once network access is established, and the attack can be executed repeatedly and reliably. The barrier to execution is low (standard network tools), but the barrier to access is higher than internet-facing scenarios. The lack of KEV status indicates this has not yet been observed in active exploitation in the wild, though the hospital environment and patient safety implications warrant proactive attention.

Remediation

Upgrade Dräger Infinity M300 devices to software versions beyond VG2.x as specified in Dräger's advisory. Coordinate with Dräger for availability of patched firmware and validation of upgrade procedures for clinical devices. Interim mitigations include network segmentation to restrict access to the Infinity Network, limiting which devices and users can communicate with M300 monitors, and monitoring for unusual restart patterns that could indicate attack attempts. Establish manual restart procedures and staff awareness protocols in case a device enters a failed state.

Patch guidance

Contact Dräger directly for patched firmware versions and upgrade guidance specific to your Infinity M300 device fleet. Verify the exact software version currently deployed on each device and cross-reference against Dräger's advisory to confirm whether your fleet is in scope. Dräger will provide instructions for safe firmware upgrade in a clinical environment, including any required downtime, validation steps, and rollback procedures. Test upgrades in a non-critical setting if possible before deploying to active patient monitoring devices. Document pre- and post-upgrade software versions for compliance and incident response records.

Detection guidance

Monitor Infinity Network traffic for repeated reboot commands or unusual restart sequences directed at M300 devices. Establish baseline logging of normal device restart patterns and alert on deviations—particularly clusters of restarts affecting multiple devices in a short time window. Check device logs and system event records for unplanned restart events correlated with periods of unavailability. Network segmentation and access controls should be reviewed to ensure only authorized clinical systems can communicate with monitoring devices. If a device enters a fail state, preserve logs and communicate with Dräger for forensic review before manual recovery.

Why prioritize this

Although scored MEDIUM severity (CVSS 6.5), this vulnerability warrants priority attention because the attack directly threatens patient safety by silencing real-time monitoring and alarms in a clinical setting. The attack surface—any network-attached M300 device—makes it relevant to most hospital deployments. Insider threats and compromised workstations are persistent risks in healthcare environments. The lack of active exploitation (KEV=false) suggests a narrow window to patch before the vulnerability becomes weaponized. Early action prevents scenarios where monitoring gaps correlate with adverse outcomes.

Risk score, explained

CVSS 3.1 score of 6.5 (MEDIUM) reflects Attack Vector: Adjacent (network access required, not internet-facing), Attack Complexity: Low (no special conditions), Privileges Required: None, User Interaction: None, and Impact on Availability: High (monitoring and alarms are unavailable). Confidentiality and Integrity are unaffected. In clinical context, however, the business and safety impact elevates urgency beyond the numeric score; healthcare risk models should factor in mission-critical availability and patient safety implications, not just technical severity metrics.

Frequently asked questions